很早就听说过很多软件厂商谈到云计算，以此来说明他们的技术先进与强大，我听得到最多的还是病毒软件厂商。但说实在，我一直没有明白，今天从亚马逊的云计算服务介绍与报价倒是清楚了许多。

其实简单理解就是利用一种软件技术将硬件资源虚拟化，透明化，使得硬件资源计算能力跨越空间与物理限制，给人感觉就像云一样无处不在。

这样冷冰冰的硬件资源，又以一种新的服务形式体现出来了。下面这份报价就说明很清楚。

看来IDC又要重新革命了。

Amazon Elastic Compute Cloud

Amazon Elastic Compute Cloud uses Amazon Simple Storage Service to store and access your images. After completing the sign-up process, you will have signed up to use Amazon Simple Storage Service.

Pricing

United States

Amazon EC2 running Linux/UNIX
$0.10 per Small Instance (m1.small) instance-hour (or partial hour)
$0.40 per Large Instance (m1.large) instance-hour (or partial hour)
$0.80 per Extra Large Instance (m1.xlarge) instance-hour (or partial hour)
$0.20 per High-CPU Medium Instance (c1.medium) instance-hour (or partial hour)
$0.80 per High-CPU Extra Large Instance (c1.xlarge) instance-hour (or partial hour)
Amazon EC2 running Windows
$0.125 per Small Windows Instance (m1.small) instance-hour (or partial hour)
$0.50 per Large Windows Instance (m1.large) instance-hour (or partial hour)
$1.00 per Extra-Large Windows Instance (m1.xlarge) instance-hour (or partial hour)
$0.30 per High-CPU Medium Windows Instance (c1.medium) instance-hour (or partial hour)
$1.20 per High-CPU Extra Large Windows Instance (c1.xlarge) instance-hour (or partial hour)
Amazon EC2 running Windows with SQL Server Standard
$1.10 per Large Windows Instance and SQL Server Standard (m1.large) instance-hour (or partial hour)
$2.20 per Extra-Large Windows Instance and SQL Server Standard (m1.xlarge) instance-hour (or partial hour)
$2.40 per High-CPU Extra Large Windows Instance and SQL Server Standard (c1.xlarge) instance-hour (or partial hour)
Amazon EC2 running Windows with Authentication Services
$0.25 per Small Windows Instance with Authentication Services (m1.small) instance-hour (or partial hour)
$0.75 per Large Windows Instance with Authentication Services (m1.large) instance-hour (or partial hour)
$1.50 per Extra-Large Windows Instance with Authentication Services (m1.xlarge) instance-hour (or partial hour)
$0.50 per High-CPU Medium Windows Instance with Authentication Services (c1.medium) instance-hour (or partial hour)
$2.00 per High-CPU Extra Large Windows Instance with Authentication Services (c1.xlarge) instance-hour (or partial hour)
Amazon EC2 running Windows with Authentication Services and SQL Server
$1.35 per Large Windows Instance with Auth Services (m1.large) and SQL Server Std instance-hour (or partial hour)
$2.70 per Extra-Large Windows Instance with Auth Services (m1.xlarge) and SQL Server Std instance-hour (or partial hour)
$3.20 per High-CPU Extra Large Windows Instance with Auth (c1.xlarge) and SQL Server Std instance-hour (or partial hour)
Elastic IP Addresses
$0.01 per non-attached Elastic IP address per complete hour
$0.00 per Elastic IP address remap - first 100 remaps / month
$0.10 per Elastic IP address remap - additional remap / month over 100
Amazon Elastic Block Store
$0.10 per GB-Month of provisioned storage
$0.10 per 1 million I/O requests
$0.15 per GB-Month of snapshot data stored
$0.01 per 1,000 PUT requests (when saving a snapshot)
$0.01 per 10,000 GET requests (when loading a snapshot)
Amazon CloudWatch
$0.015 per instance-hour
Elastic Load Balancing
$0.025 per LoadBalancer-hour
$0.008 per GB data processed by the LoadBalancer
Data Transfer
$0.100 per GB Internet Data Transfer - all data transfer into Amazon EC2
$0.170 per GB Internet Data Transfer - first 10 TB / month data transfer out of Amazon EC2
$0.130 per GB Internet Data Transfer - next 40 TB / month data transfer out of Amazon EC2
$0.110 per GB Internet Data Transfer - next 100 TB / month data transfer out of Amazon EC2
$0.100 per GB Internet Data Transfer - data transfer out of Amazon EC2 / month over 150 TB
$0.010 per GB Regional Data Transfer - in/out/between Availability Zones or when using public IP addresses, Elastic IP addresses, or Elastic Load Balancing
Europe

Amazon EC2 running Linux/UNIX
$0.11 per Small Instance (m1.small) instance-hour (or partial hour)
$0.44 per Large Instance (m1.large) instance-hour (or partial hour)
$0.88 per Extra Large Instance (m1.xlarge) instance-hour (or partial hour)
$0.22 per High-CPU Medium Instance (c1.medium) instance-hour (or partial hour)
$0.88 per High-CPU Extra Large Instance (c1.xlarge) instance-hour (or partial hour)
Amazon EC2 running Windows
$0.135 per Small Windows Instance (m1.small) instance-hour (or partial hour)
$0.54 per Large Windows Instance (m1.large) instance-hour (or partial hour)
$1.08 per Extra-Large Windows Instance (m1.xlarge) instance-hour (or partial hour)
$0.32 per High-CPU Medium Windows Instance (c1.medium) instance-hour (or partial hour)
$1.28 per High-CPU Extra Large Windows Instance (c1.xlarge) instance-hour (or partial hour)
Amazon EC2 running Windows with SQL Server Standard
$1.14 per Large Windows Instance and SQL Server Standard (m1.large) instance-hour (or partial hour)
$2.28 per Extra-Large Windows Instance and SQL Server Standard (m1.xlarge) instance-hour (or partial hour)
$2.48 per High-CPU Extra Large Windows Instance and SQL Server Standard (c1.xlarge) instance-hour (or partial hour)
Amazon EC2 running Windows with Authentication Services
$0.26 per Small Windows Instance with Authentication Services (m1.small) instance-hour (or partial hour)
$0.79 per Large Windows Instance with Authentication Services (m1.large) instance-hour (or partial hour)
$1.58 per Extra-Large Windows Instance with Authentication Services (m1.xlarge) instance-hour (or partial hour)
$0.52 per High-CPU Medium Windows Instance with Authentication Services (c1.medium) instance-hour (or partial hour)
$2.08 per High-CPU Extra Large Windows Instance with Authentication Services (c1.xlarge) instance-hour (or partial hour)
Amazon EC2 running Windows with Authentication Services and SQL Server
$1.39 per Large Windows Instance with Auth Services (m1.large) and SQL Server Std instance-hour (or partial hour)
$2.78 per Extra-Large Windows Instance with Auth Services (m1.xlarge) and SQL Server Std instance-hour (or partial hour)
$3.28 per High-CPU Extra Large Windows Instance with Auth (c1.xlarge) and SQL Server Std instance-hour (or partial hour)
Elastic IP Addresses
$0.01 per non-attached Elastic IP address per complete hour
$0.00 per Elastic IP address remap - first 100 remaps / month
$0.10 per Elastic IP address remap - additional remap / month over 100
Amazon Elastic Block Store
$0.11 per GB-Month of provisioned storage
$0.11 per 1 million I/O requests
$0.18 per GB-Month of snapshot data stored
$0.012 per 1,000 PUT requests (when saving a snapshot)
$0.012 per 10,000 GET requests (when loading a snapshot)
Data Transfer:
$0.100 per GB Internet Data Transfer - all data transfer into Amazon EC2
$0.170 per GB Internet Data Transfer - first 10 TB / month data transfer out of Amazon EC2
$0.130 per GB Internet Data Transfer - next 40 TB / month data transfer out of Amazon EC2
$0.110 per GB Internet Data Transfer - next 100 TB / month data transfer out of Amazon EC2
$0.100 per GB Internet Data Transfer - data transfer out of Amazon EC2 / month over 150 TB
$0.010 per GB Regional Data Transfer - in/out/between Availability Zones or when using public IP or Elastic IP addresses